EP 1852806 A1 20071107 - HANDWRITTEN CHARACTER RECOGNIZING METHOD, HANDWRITTEN CHARACTER RECOGNIZING SYSTEM, HANDWRITTEN CHARACTER RECOGNIZING PROGRAM, AND RECORDING MEDIA
Title (en)
HANDWRITTEN CHARACTER RECOGNIZING METHOD, HANDWRITTEN CHARACTER RECOGNIZING SYSTEM, HANDWRITTEN CHARACTER RECOGNIZING PROGRAM, AND RECORDING MEDIA
Title (de)
VERFAHREN, SYSTEM UND PROGRAMM ZUR ERKENNUNG HANDSCHRIFTLICHER ZEICHEN UND AUFZEICHNUNGSMEDIEN
Title (fr)
PROCÉDÉ DE RECONNAISSANCE DE CARACTÈRES MANUSCRITS, SYSTÈME DE RECONNAISSANCE DE CARACTÈRES MANUSCRITS, PROGRAMME DE RECONNAISSANCE DE CARACTÈRES MANUSCRITS ET SUPPORTS D'ENREGISTREMENT
Publication
Application
Priority
- JP 2006303104 W 20060215
- JP 2005038224 A 20050215
Abstract (en)
In a case in which handwritten character recognition such as online handwritten character recognition is implemented, simple and high performance character recognition by which transformation such as remarkable transformation and rotation is able to be treated and which recognizes an input that is written in a single stroke such as kaisho-writing, is provided. Because of this, the present invention performs: capturing an input handwritten character with parameter representation for each stroke and applying a polygonal approximation to each stroke; assuming each polygonal line segment approximated by the polygonal approximation to be vector that reaches an end point from a start point, and obtaining an angle between an axis that becomes a reference and each line segment as a polygonal line segment angle sequence; obtaining an exterior angle sequence of vertices of the obtained polygonal line segments; making a sum of exterior angles of the same sign, where the same sign of plus or minus in the exterior angle sequence continues, to be a winding angle sequence; extracting a global feature according to each obtained sequence and a localized or quasi-localized feature in each curved portion divided corresponding to the winding angle sequence, hierarchically and divisionally; and performing the character recognition by comparing the extracted result with a template of an object character for recognition that is provided in advance.
IPC 8 full level
G06K 9/46 (2006.01); G06K 9/62 (2006.01); G06K 9/68 (2006.01)
CPC (source: EP KR US)
G06F 18/00 (2023.01 - KR); G06V 10/75 (2022.01 - KR); G06V 30/1423 (2022.01 - EP US); G06V 30/347 (2022.01 - EP US)
Citation (search report)
See references of WO 2006088222A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1852806 A1 20071107; CN 101160592 A 20080409; CN 101160592 B 20100519; JP 4092371 B2 20080528; JP WO2006088222 A1 20080710; KR 20070112454 A 20071126; US 2009136136 A1 20090528; US 8290274 B2 20121016; WO 2006088222 A1 20060824
DOCDB simple family (application)
EP 06714244 A 20060215; CN 200680012579 A 20060215; JP 2006303104 W 20060215; JP 2006525406 A 20060215; KR 20077018616 A 20070814; US 81626606 A 20060215